24/11/2017 Newsround

See ya.

See ya.

Hi, I'm Ayshah and

this is Newsround.

First up, a BBC investigation has

shown there are problems

with the way YouTube deals

with upsetting comments

aimed at children.

The people who monitor and report

these comments say they're worried

that they are not being removed,

even after they have been reported.

YouTube say they remove most of thes

upsetting comments within 24 hours,

but children's charity the NSPCC say

they want more to do be

done by the Government.

And the company.

And don't forget for help and advice

on this you can head to the website

and check out our staying

safe online guide.

It's Black Friday today!

So what's that?

It's when adults spends loads

of money on big sales.

It's something that started

in America and then came here.

People in the UK are expected

to spend over £1 billion - let's

hope there's some Christmas

pressies in there!

Now, if you've ever watched

Star Wars you might be familiar

with warp speed technology,

which allows people to travel

through space at super-fast speeds.

-- if you've ever watched Star Trek.

In this week's Big Question Oliver

asked how far away are we from

making this technology in real life?

So who better to answer it

than a Nasa jet propulsion expert?!

Well, right now it's impossible

for us to move at warp

speed through space.

We've thought about ways

of trying to do that,

but there is nothing

that is practical at this point.

For example, right now our fastest

spaceships can travel

at about 25,000 miles an hour.

With the speed of light,

we can travel at about

186,000 miles a second.

If we could travel at that speed,

that would take us a second

and a quarter to get to the moon.

Right now, with our fastest ships,

we can take about three

days to get to the moon.

So, well, really, really slow

in comparison to the speed of light.

Now, we've also computed how much

energy it takes for a spaceship

to go at about a tenth of the speed

of light, and that is about between

five and 100 times the total

world energy output.

So, wow, all that energy,

so much, and we just don't

have that on the earth.

So we're going to have to find some

new fantastic way of creating that

energy before we can even think

about going near the speed of light,

let alone going at warp speed.

Mooli... We will be answering one of

your big questions every Thursday,

so if you have something to as, go

online now.

Next meet the world's best teacher!

Maggie MacDonnell from Canada

won this year's famous

Global Teacher Prize.

She teaches at a school

in the Arctic Circle,

where the children walk for miles

through snow and freezing

temperatures just to get to class.

Everyday when my students come

to school and they come

in my classroom, I thank them

for getting there that day.

Because I know they've run

a marathon sometimes,

they've run over all sorts

of obstacles just to get

to the classroom door.

My name is Maggie MacDonnell

and I teach in the Arctic.

As a teacher in the Arctic,

the definition of a teacher

there is very, very broad.

We are not only instructing

lessons in the classroom,

but you really have to engage

with your students

outside of the classroom.

You have to make the class

and school welcoming to them.

They have to see

you in the community.

Often you take on roles such

as a social worker or a counsellor

or maybe even a family friend.

I think that if a student

from the UK or India

were to drop into my classroom,

the one thing that they may be

surprised about is that not every

classroom has four walls.

And as much as possible

I try to take my students outside

of the traditional school

and into the community where we can

do project-based learning,

authentic learning, and I think

that's what's really powerful

about the style of teaching that

I've been working on.

As much as possible I love

integrating my students

into the community, creating

opportunities for them to offer

community service and basically

create opportunities for my students

to see themselves not

as problems but as agents

of change in their community.

That's all from me, we'll be

back in half an hour.

Bye.